[Battery usage U] [UI] Show total "Screen On Time" in the battery usage page

Screen record: https://drive.google.com/open?id=16ZOp1E2YBzWQXbnXl786FaLFPel-S9CF&authuser=0&resourcekey=0-oRqCrdTc9FZjVgsq9orhEw&usp=drive_link
For Arabic: https://drive.google.com/open?id=1zh_4jcUnqLC6CDgwju1qQkWJ0QCtm19c&authuser=0&resourcekey=0-kuKfDdOTWxqOUmD0RfPNLQ&usp=drive_link

Next step: show screen on time for each app

Bug: 258120710
Test: manual
Change-Id: I2085a2a85ebd50b2ac876972f6a8ebbf6f20246c

tests/robotests/src/com/android/settings/fuelgauge/batteryusage/ScreenOnTimeControllerTest.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.fuelgauge.batteryusage;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.os.LocaleList;
+
+import androidx.preference.PreferenceCategory;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+import java.util.Locale;
+import java.util.TimeZone;
+
+@RunWith(RobolectricTestRunner.class)
+public final class ScreenOnTimeControllerTest {
+
+    private Context mContext;
+    private ScreenOnTimeController mScreenOnTimeController;
+
+    @Mock
+    private PreferenceCategory mRootPreference;
+    @Mock
+    private TextViewPreference mScreenOnTimeTextPreference;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        Locale.setDefault(new Locale("en_US"));
+        org.robolectric.shadows.ShadowSettings.set24HourTimeFormat(false);
+        TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
+        mContext = spy(RuntimeEnvironment.application);
+        final Resources resources = spy(mContext.getResources());
+        resources.getConfiguration().setLocales(new LocaleList(new Locale("en_US")));
+        doReturn(resources).when(mContext).getResources();
+        mScreenOnTimeController = new ScreenOnTimeController(mContext);
+        mScreenOnTimeController.mPrefContext = mContext;
+        mScreenOnTimeController.mRootPreference = mRootPreference;
+        mScreenOnTimeController.mScreenOnTimeTextPreference = mScreenOnTimeTextPreference;
+    }
+
+    @Test
+    public void handleSceenOnTimeUpdated_nullScreenOnTime_hideAllPreference() {
+        mScreenOnTimeController.handleSceenOnTimeUpdated(
+                /* screenOnTime= */ null, "Friday 12:00-now");
+
+        verify(mRootPreference).setVisible(false);
+        verify(mScreenOnTimeTextPreference).setVisible(false);
+    }
+
+    @Test
+    public void showCategoryTitle_null_sinceLastFullCharge() {
+        mScreenOnTimeController.showCategoryTitle(null);
+
+        verify(mRootPreference).setTitle("Screen time since last full charge");
+        verify(mRootPreference).setVisible(true);
+    }
+
+    @Test
+    public void showCategoryTitle_notNull_slotTimestamp() {
+        mScreenOnTimeController.showCategoryTitle("Friday 12:00-now");
+
+        verify(mRootPreference).setTitle("Screen time for Friday 12:00-now");
+        verify(mRootPreference).setVisible(true);
+    }
+
+    @Test
+    public void showScreenOnTimeText_returnExpectedResult() {
+        mScreenOnTimeController.showScreenOnTimeText(1600000000L);
+
+        ArgumentCaptor<CharSequence> argumentCaptor = ArgumentCaptor.forClass(CharSequence.class);
+        verify(mScreenOnTimeTextPreference).setText(argumentCaptor.capture());
+        assertThat(argumentCaptor.getValue().toString()).isEqualTo("18 days, 12 hr, 27 min");
+        verify(mScreenOnTimeTextPreference).setVisible(true);
+    }
+}

tests/robotests/src/com/android/settings/fuelgauge/batteryusage/TextViewPreferenceTest.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.fuelgauge.batteryusage;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.spy;
+
+import android.content.Context;
+
+import com.android.settings.R;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public final class TextViewPreferenceTest {
+
+    private Context mContext;
+    private TextViewPreference mTextViewPreference;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mContext = spy(RuntimeEnvironment.application);
+        mTextViewPreference = new TextViewPreference(mContext, /*attrs=*/ null);
+    }
+
+    @Test
+    public void constructor_returnExpectedResult() {
+        assertThat(mTextViewPreference.getLayoutResource()).isEqualTo(
+                R.layout.preference_text_view);
+    }
+
+    @Test
+    public void setText_returnExpectedResult() {
+        final String text = "TEST_TEXT";
+        mTextViewPreference.setText(text);
+
+        assertThat(mTextViewPreference.mText.toString()).isEqualTo(text);
+    }
+}